PBAT poly(butylene adipate-co-terephthalate)
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PBAT, poly (butylene adipate-co-terephthalate) is a biodegradable aliphatic copolyester aromatic synthetic, derived mainly from 1,4-butanediol, adipic acid and terephthalic acid. Its chemical structure is formed by an aliphatic party responsible for biodegradability, and an aromatic portion providing good mechanical properties. The mixture of aliphatic and aromatic polyesters , not only improves the mechanical properties of the aliphatic polyester and preserves the biodegradability, but also to control the degradation rate by varying the compositions of the homopolymers in the copolymer.
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Properties PBAT |
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- amorphous thermoplastic
- compostable
- Biodegradable
- Very flexible, similar LDPE - LLDPE
- Good thermal stability up to 230 ° C
- Low water barrier properties
- Ideal mixing component bioplastics
- Processable on conventional blown film plants
- Printable and weldable
- Suitable for food contact
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Products range
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The PBAT are biodegradable and can be produced in a sustainable and friendly way with the environment, using renewable raw materials or industrial waste. Although the advantages of PBATs are evident, the cost of production of these biopolymers is high.
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Thermal properties PBAT
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Good thermal stability up to 230°C
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Physical properties PBAT |
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PBAT is a synthetic copolymer with good mechanical properties. This biodegradable polymer are, as it degrades completely in short time, by microbial attack (fungi, bacteria and enzymes) under appropriate environmental conditions. However, these materials have the same problem: significantly degrade during processing, compromising its mechanical properties and thus its applications. Thus, additive used to prevent premature degradation of these polymers as processing aids (plasticisers and lubricants), thermal stabilizers and UV, mineral and vegetable fillers, nanofillers, curing agents and graft, etc. It is an amorphous, compostable and biodegradable, highly flexible, similar thermoplastic LDPE - LLDPE.
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Chemical properties PBAT |
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Low water barrier properties
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Processability PBAT |
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The PBAT are processed according to their properties, but mainly according to the chemical composition and molecular weight can be processed into a variety of finished including films, sheets, printed products, fibers, elastic, painted articles, nonwoven products. Good processability in blown film extrusion.
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Polimerization PBAT
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Poly (butylene adipate-co-terephthalate) (PBAT) were synthesized from their respective homopolyesters by melt polycondensation, which were prepared by the direct esterification of terephthalic acid and adipic acid with 1,4-butanediol ( BDO), with titanium tetrabutoxide (TBT) as catalyst. |
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Applications PBAT |
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The PBAT bioplastics are used as alternatives to conventional plastics derived from fossil fuels and are increasingly used in food contact materials in applications such as packaging films for food and agriculture
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Keywords |
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PBAT ,Poli(Butilén Adipato-co-Tereftalato) , copoliéster, alifático, aromático, , biodegradable,1,4-butanodiol, ácido adípico, ácido tereftálico.
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